Amazon announced today that its standalone Appstore has been growing very quickly, tripling the number of apps that were in the store just 12 months ago. The company also announced that Amazon Coins, which let users save money on apps and games by buying the “currency” in bulk, have been very popular with customers having already spent “hundreds of millions” of them.

And apparently, developers are extremely happy with the store. When surveyed, 65% developers said that total revenue is just as good or better on Kindle Fire compared to other platforms, 74% said that Average Revenue per App/User is as good or better, and 76% said that the Kindle Fire “helps them connect with new market segments.”

“Developers tell us that they experience improved reach, greater monetization, and, oftentimes, higher revenue when they have their apps and games in the Amazon Appstore,” said Mike George, Vice President of Amazon Appstore and Games. “But this is just the beginning—we’re building more services and capabilities for developers and more Android-based APIs based on their feedback. Most Android apps just work on Kindle Fire, and with an Appstore made for Android devices, Amazon’s Appstore can help developers distribute their apps on Android devices all over the world. It’s a great time for developers to bring their apps to the Amazon Appstore.”

Amazon is holding a press event this wednesday, which is all but confirmed to be the company’s first entry into the smartphone market.